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IDRAFT <br /> � .__ <br /> REPORT <br /> GEOTECHNICAL ENGINEERINC� SERYICES <br /> PROPOSED NORTH PARKING LOT <br /> BOEING COMMERCIAL AIRPLAN� GROUP <br /> EVEREi7, WASHINGTON <br /> INTRODUCTION <br /> T'his report prtsents the results of our geotechnical engineering services for the proposed <br /> North Parlcin.q Lot at the Boeing E��erett facility. The aite is located in the northem portion of <br /> tbe Boeing Everett facility with adjaceot areas cons(atIng of the North Peruneter Road to the <br /> south,a steep cut slope to the sedimentation ponds on the west,undeveloped property to the nonh <br /> and a wildlife corridor to Q�e eact. A vtcinity map is presented as Figure 1. <br /> We understand that developmer.t of the site may eventually include consWction of buildings <br /> in addition to the paved pazking lot. However, the configuration and location of any fueure <br /> buildings is uncertain at this time. We also underatand that the boundazies of the proposed <br /> , pazking lot aze constrained by considerations identified in the Boeing Commercial Airplane Group <br /> , Final EIS (EnvIronmental Impact Statement). 71�ese coaviderations include ateep slope and <br /> landslide hazard areas, erosion hazard areat, adjacent wildlife corridora and on-site moisture <br /> sensitive soils. Our unders -ading of these factora is baced on discussions with vazious Boeing <br /> representadves and our review of pertineot sectioat of the EIS. <br /> We have provided prelimtnary development coasiderations for eanhwork and erosion <br /> control measures in a letter dated lune 16, 1992. The letter addresses a proposed adjustrnent of <br /> the EI5 boundary w accommodate a setback from the western steep slope, the eaztem slope and <br /> the wildlife corridor. <br /> SCOPE <br /> The purpose of our services is to ezplore the subsudace soil and ground water conditions <br /> at the site to provide the basia for developing geotechnical recommendations for design and <br /> conswction of the proposed parking lot. Our specific scope of services inciudes the following: <br /> 1. Review hiswrical design and coasuvction information peninent to the develc+ped azeas <br /> adjacent to ihe site. 7'his includes revi w <br /> e of available photographs, topographic drawin s <br /> 8 <br /> and design draw(ngs. <br /> 2. Condua a geologic reconnaissance of the site. <br /> • 3. Evaluate subsudace soil end ground water conditions across the site by excavating 16 test <br /> p�ts to depths of 6 to 17 feet and drilling 6 borings W depths of 12.5 to 38 feet, Iateall <br /> piezometers in the borings to monitor ground w�ater as appropriate. <br /> G e o E n y i n e e r � ] Rle No.0124154A10416:292 <br />